# Copyright 2020 Hsueh-Ti Derek Liu
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import bpy

def setMat_plastic(mesh, meshColor, AOStrength = 0.0):
    mat = bpy.data.materials.new('MeshMaterial')
    mesh.data.materials.append(mat)
    mesh.active_material = mat
    mat.use_nodes = True
    tree = mat.node_tree

    # set principled BSDF
    tree.nodes["Principled BSDF"].inputs['Roughness'].default_value = 0.3
    #tree.nodes["Principled BSDF"].inputs['Sheen Tint'].default_value = [0, 0, 0, 1]
    tree.nodes["Principled BSDF"].inputs['Sheen Tint'].default_value = 0
    tree.nodes["Principled BSDF"].inputs['Specular'].default_value = 0.5
    tree.nodes["Principled BSDF"].inputs['IOR'].default_value = 1.45
    tree.nodes["Principled BSDF"].inputs['Transmission'].default_value = 0
    tree.nodes["Principled BSDF"].inputs['Clearcoat Roughness'].default_value = 0

    # add Ambient Occlusion
    tree.nodes.new('ShaderNodeAmbientOcclusion')
    tree.nodes.new('ShaderNodeGamma')
    MIXRGB = tree.nodes.new('ShaderNodeMixRGB')
    MIXRGB.blend_type = 'MULTIPLY'
    tree.nodes["Gamma"].inputs["Gamma"].default_value = AOStrength
    tree.nodes["Ambient Occlusion"].inputs["Distance"].default_value = 10.0
    tree.nodes["Gamma"].location.x -= 600

    # set color using Hue/Saturation node
    HSVNode = tree.nodes.new('ShaderNodeHueSaturation')
    HSVNode.inputs['Color'].default_value = meshColor.RGBA
    HSVNode.inputs['Saturation'].default_value = meshColor.S
    HSVNode.inputs['Value'].default_value = meshColor.V
    HSVNode.inputs['Hue'].default_value = meshColor.H
    HSVNode.location.x -= 200

    # set color brightness/contrast
    BCNode = tree.nodes.new('ShaderNodeBrightContrast')
    BCNode.inputs['Bright'].default_value = meshColor.B
    BCNode.inputs['Contrast'].default_value = meshColor.C
    BCNode.location.x -= 400

    # link all the nodes
    tree.links.new(HSVNode.outputs['Color'], BCNode.inputs['Color'])
    tree.links.new(BCNode.outputs['Color'], tree.nodes['Ambient Occlusion'].inputs['Color'])
    tree.links.new(tree.nodes["Ambient Occlusion"].outputs['Color'], MIXRGB.inputs['Color1'])
    tree.links.new(tree.nodes["Ambient Occlusion"].outputs['AO'], tree.nodes['Gamma'].inputs['Color'])
    tree.links.new(tree.nodes["Gamma"].outputs['Color'], MIXRGB.inputs['Color2'])
    tree.links.new(MIXRGB.outputs['Color'], tree.nodes['Principled BSDF'].inputs['Base Color'])

class colorObj(object):
    def __init__(self, RGBA, \
    H = 0.5, S = 1.0, V = 1.0,\
    B = 0.0, C = 0.0):
        self.H = H # hue
        self.S = S # saturation
        self.V = V # value
        self.RGBA = RGBA
        self.B = B # birghtness
        self.C = C # contrast